An intermediate bulk container, valve and connector system is provided that includes a split nut connector. The split nut connector is rotatably mounted on a valve adapter plate which connects with the valve, and is internally threaded for engagement with external threads on the intermediate bulk container outlet. An O-ring seal is aligned and positioned between the adaptor plate inlet and intermediate bulk container outlet by positioning surfaces to provide compression and sealing between the component engaging surfaces, and sealing contact is provided between corresponding surfaces of the components.